Process and apparatus for feeding glass



May 10 1927.

S w. J. MILLER PROCESS AND APPARATUS FOR FEEDING GLASS Filed July 22.1921 5 Sheets-Sheet l 2Z 1 E Z422 5 M/ W Z? INVENTOR W TN ass 7 [Infor17 May 10 1927.

W' J. MILLER PROCESS AND APYARATUS FOR FEEDING GLASS Filed July 22. 19213 Sheets-sheet 2 INVEMTOR May 10 1927. 1,628,324

w. J. MILLER PROCESS AND APPARATUS FOR FEEDING GLASS Filed July 22, 1921s Sheets-Sheet 5 INVENTOR f M w n A 39% VIII WITNESS 71VW0FFPatented-May It), 1927.

[UNITED ATES PATE OFFI'QE.

WILLIAM'J. MILLER, or sw IssvALE BOROUGH, PENNSYLVANIA, AssIeNoR '10HART- FORD-EMPIRE ooMrANY; or HARTFORD, oo NEoTIoU'r, A CORPORATION OFDEL- AWARE.

- Application filed Jul 22,

' discharged from a shallow receptacle or boot a [connected with thetank, and to which the cross section;

Variations in temperature,

3 feederboot-"for the purpose of diverting the f hot glass towardtheywalls' of the boot, but

glass is supplied from the tank by a con stantlevel opening. or ,by someother means. The glass in the'boot tends to chill next to the wallsandfloor-of the boot, leaving a zone of hotter glass along the. topcenterof the boot. The result is a body of glass of irregulartemperature and viscosity which causes cordy or imperfect ware.

The discharge orifice of the feeder is usu-' ally in the floorof theboot adjacent to its nose, and therefore-the glass. at the front andsides of the dischargeprifice is colder than that at the rear, tendingto devitrify and rendering the temperature ofthe glass as it isdischarged uneven throughout its of course, result'in varying viscosity;and, insomuch as viscos'ty is an important factor in glass feeding,especially in the formation of suspended gobs, unlessthe temperaturethroughout the;

- crosssection' and length of the gob is uniform, the gob will bedistorted-and improperly shaped; and if the teniperaturespfthe gobsvary,no uniformity of size and shape can be nraintaincdin a succession ofgobs, p

Attempts have been made to rectify these conditions by imposing baifiesor dividing blocks in the path of the glassentering the this has notproduced satisfactory results.

'Thg object whiehI have in view is to in-. sure a uniform temperaturethroughout the glass in the boot, so that not only will the temperaturethroughout the cross section PROCES AND APPARATUS FEEDING GLASS.

1921'. Serial N9. 486,712.

and length of a be uniform, but also the temperature of the successionof,-gobs or' portions will be mains tained uniform. f I accomplish/theseobjects by a stirring or agitation-of the glass -in the boot which iscarried on contemporaneously with the discharge of gobs or portions,thereby breaking up and thoroughly intermingling the zones and strata ofdifferent temperatures into mass of, uniform temperature and,consequently, uniforni viscosity.

' As a convenient means for causing the de-' sired stirring or agitationof'the glass, I may usej a rotary stirring-tool or tools formed ofrefractory materlal and extending-into the molten glass contained in theboot. In

the case of a feeder provided with a. botob or discharged portion tomdischarge orifice and with a reciprocating plunger to control thedischarge of glass through the orifice, I may accomplish the agitationor stirring of the glass by imparting a rotary motion to thereciprocating plunger. Or I may use one or more-stirring tools distinctfrom the plunger which latter may or may not be rotated.

In 'the case of streamfeederswherin a valve'is provided forclosing thedischarge orifice to shut down the feed, said valve may be rotated, whenelevated, to perform the functions of astir're'r. g

In the accompanying drawin s, which are merely intended to illustrate te principles of my invention without limiting the scope of the latter tothe, construction shown, and wherein I show my invention in connectionwith a feeder provided with an orifice in the floor; of the; boot and avertically disposed plungerreciprocating in relation to said'oritice tocontrol the discharge of glass, Fig. ,1

is a .verticalsection of the feeder mechanism;

Fig. 2 is a plan view partially in section along the line 'II"II in Fig.1; Fig. 3'is an enlarged detail showing part ;of the rotator yoke andits operative connection .to the plunger; Fig. 4 is a front elevation ofthe feeder; Fig. 5 is a detail in section showing the plunger revolvinggears and the plunger stem Fig. 6 is a view similar to Fig. 1 showing asecond stirring member nun-m or tool rotated in opposite direction tothe plunger; Fig. 7 is a front viewof the housing shown in Fig. 6; Fig.Sis a horizontal section taken along the line VIII- VIII in Fig. 6; Fig.9 is a section taken along the line IX-IX in Fig. (3 showing theoperative connection between the plunger and the stirrer; Fig. 10 is adiagran'nnatic view illustrating means for rotating the plunger and thestirrer in the same direction; Fig. 11 is a section similar to Fig. 8showing the use of two stirrers in addition to the plunger, and Fig. 12is a view similar to Fig. 9 showing the assembling of the two stirrers.

The following is a detailed description of the drawings, reference beingfirst had to Figs. 1, 2, 3, 4, and 5.

A represents the glass tank from which extends the relatively shallowreceptacle or boot B. I have shown the boot'supplied with glass from thetank through the constant level opening or passage 1; but any otherconvenient means for supplying glass from the tank to the boot may besubstituted.

The boot B is provided with a bottom dis charge orifice 2 near its noseor outer end.

C is a vertieally disposed plungerwvhich is alined with and reciprocatesin relat1o1r to the orifice 2 to control the flow of glass through thelatter. The body of the plunger is formed of refractory material and thesame is guided in its movement by means of the slide bearing formed bythe bushing 3 depending through an aperture in the roof of the boo i Theplunger is suspended by ametal stem l whose lower portion-is of enlargeddiameter and whose threaded upper portion extends through a bifurcatedhead in which i it is adjustably secured by'upper and lower nuts 6, thusproviding for the regulation of the position of the plunger. The, stem 4fits looselycenough in the head 5 to permit free rotation of the plungerand the nuts 6 are not screwed tight enough against the head to bind,said nuts being preferably locked in position by the small set screws 6.The head 5 is pivotally mounted on the walle ing beam 7, to swing on ahorizontal axis.

One end of the walking beam 7 is ad justably fulcrumed on a post 8extending up from the boot B, while near its other end a bolt 9 connectssaid walkingbeam with the horizontally slotted head 10 of the piston rod11 connected to the piston in the fiuid pressure cylinder D.

12 is a threaded bolt pivoted to the adjacent end of the walking beamand depending through a hole in a plate 13 extending from the head ofcylinder D and 14 represents upper and lower stop nuts by means of whichthe uppermost and lowermostpositions of the plunger may'be regulated.

The lower enlarged portion of the plunger Leaaeaa stem 4: is providedwith a circumferential series of teeth 15, said teeth being pitched inthe direction in which the plunger is to be rotated, shown as clockwisein Fig. 3.

16 is a collar bolted to the top of the boot l3 and whose bore looselyfits the. stem 4. The upper face of said collar is circuin thehorizontally disposed,fluid pressurecylinder H mounted on top of theboot.

The two parallel legs 20 and 21' of said 7 yoke extend on either side ofthe gears E and F, the leg 20 being on the same level as the lower gearE while the leg 21 is on the level ofthe upper gear F The inner faces ofsaid legs are provided withteeth which mesh with the teeth of saidgcars,so that as said yoke 18 recrprocated. by means ,of fluid pressureadmitted to the ends of the cylinder H, the gears are rbtated first inone direction and then 1n the other; the two gears always moving inopposite directions,

to each other;

l I I l The gearE is provided on its upper surface with a pawl 22 heldin engagement with the teeth 15 of the plunger stemby a leaf spring 23,so that when the lower gear is rotated in a clockwisedirection bytheout-- ward movement of the yoke G, the plunger will also be rotated butwhen the gear is rotated counter-clockwise by the retreat of the yoke,the pawl will trail idly over the teeth 15 without reversing the-rotarymovement of the plunger. If desired the pawl may be held retracted bymeans of a pin 24 inserted in a hole 25 in the gear in front of thepawl, thereby disconnecting the gear from the plunger. By insertingthe-pin in the rear of the pawl, the same will be locked in engagementwith the teeth 15, as shown inFig. 3.- The upper gear Fn'iay be pro-Vided with a suitable aperture 26 to permit the pin 24 to be inserteddown. into the hole 25 in the gear E. f p

On its under face the gear F is also'provided with a pawl 27 held inengagement with the "teeth 15 byh leaf spri ng 28, so

that when the gear F is rotated clockwise by the retreat of the yoke G,the plunger will be rotated in the same directionv while thecounterclockwise rotation of the gear F will not impart similar rotationto the plunger.

A headed pin 29 may be inserted' down through the hole-30 in the gearF-to hold the pawl 27 retracted and disconnect the gear F lirom theplunger or tolock thepawl tion of enlarged diameter and provided inengagement with. the teeth 15.

with a circumferentially disposed series of Thus the reciprocation ofthe yoke .G will teeth pitched in the desired direction of result insubstantially continuous rotation rotation of the tool J. The upper endof the in one direction ofthe plunger. stem 4 'is inserted in abifurcated head 7 I If desired thepawl of one of the gears and nuts 36screwed on said stem above and may be pinned back in its inoperativepobelow said head provide means for regulatsition,, whereby the plungerwill be rotated ing the extent to which the tool Jris imniersed in theglass in the boot, The head 35 is supported by a post 37 extending upintermittently. I

If the pawl of one of the gears be locked in its retracted positionwhile the pawl of from the boot. p r thelother gear is locked intocontact with The plunger C and the tool J extend-up the teeth 15, thepltinger will be rotated through a housing K which is bolted to the backand forthordn opposite directions. top. of the boot to contain the lowerand To prevent the gearsE and F from being upper gears E and F which arein this case I moved upwardly with the stem 4, I provide mounted on thestem on the tool J, instead an arched housing I having at its center aof on the plunger (3 as in Fig. 1.

The collar 31 which encircles the stem 4 above plunger C is providedwith a gear 38 -the gear E, and whose legs are bolted to 'niounted inthe housing K and having an in tain them in proper alinement.

mission of fluid pressure alternately to its with the gears E and F.respectively.

end of thecylinder, whereby the imward ti n as the tool.

the top of the boot BfflS at 32. tegral key 39 which engages alongitudinal 33 represent recessed guides extending up slot 40 in theplunger stem 4, so that while from the top of the boot and in which thethe plunger moves freely up and down in' legs 20 and 21 of the yokeslide to mainthe bore of the gear, it rotateshvith the gear.

' The gear 38 is in mesh with a gear 41 keyed The cylinder H is providedwitlr any suit- .to the stem 4 of the tool J. The teeth of the ablecharacter of valve control for the adlegs 20 and 21 of the yoke Gr areinmesh opposite ends to produce the desired reciplt is evident that the'tool J willbe rorocatio'n of the yoke]! The speed of plunger tated inone li i*ectioii, say counterclockwise, -rotation is dependent upon thede that while the plunger will be "rotated in the glass in the boot andits fluidity, as a s mallow other direction. If desired, the gear 38 maybody of. re atively hot glass requires less be omitted, andthus theplunger will not ,be stirring than a deeper and colder body of rotated Kq I, glass. The rear end of the cylinder is preflu Flt. 10 ll show anidler gear 42 inter erably provided with a screw bolt 33 exposed betweenthe'gears 38 and 41, thus causl tending througha threaded hole in therear g he plunger to rotate in the Sam dir cmovemem f the piston andconsequently In Fig.6 I show the tool J well forward .th cycle f theyoke t} may be adjusted as in the boot, but it will be understood that 1sume the same 50 "plunger will thoroughly stiru .vertical' reci 'to theplunger.

desired. j r the same may be located nearer the tank or m It is'preferable, howeter. to insure one or additional'rotary-tools may beprovided, if more omplete rotations of the plunger-"for found necessary.to keep the entire contents each reciprocal cycle, so that the plungerof the boot well stirred and intermingled. will always be presented atits lowermost In l igs. 1'1 and 12,1 illustrated theuse of ypoint inexactly the .same' position; thus a pair of rotary stirring tools J andgsavoiding variations;otldischarge due= to' irregularities in theplunger.

A pl ced side by side in the rear of the p'unger It is also, gone ofsaid tools being rotated in one di preferable to have the plunger alwaysasrection by the leg 20 of the yolceG vwhile position in its uppermostpothe other tool is rotated in the opposite .di-I s'ition. rection bythe ic It is evident that the. rotation of the found nccessary,be gearedto one at the tools and interto receive rotation theretro. L mingle theglass in the boot, so t rat the glass It will be understoodthat thenumber of passing into the disharge orifice from all rotating toolsrequired depends upon. the sides will he of uniform temperature. andquantity and temperature ofthe glass pass. 320 that this rotarymovement, assisted 'by'the ing from the tank into the boot. lWherethe'rocation of the. plunger will glass is being discharged in large unitsor completely obliterate all unevenness of, teinportions, a relativelylargevolume ofg'uss peratureot the glass in the boot. will be travellinginto the boot and sutlicient In Figs. 6, 7, 8 and 9,1 show th'euse of astirring means should be provided to insure secondstirring oragitatingtool in addition -a uniform temperature condition in the;

7 lass. i Thus J is atool of refractory material sus- I have'shown thestirring members in a ,pended'ftln'ough" the top bushing 34 by verticalposition. but it is evident that the means of-a metal stem e whose lowerporsame may be inclined to the vertical, or. i

2i. The'plunger may, iii-.

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titi

even he horizontally disposed, if desired, without departing from thespirit oil my mrention.

duitahle shearing means are provided to detach the masses of glassdepending from the outlet. Numerous types of shears or cutting means areu'el known in the art. and any of the same may be employed in connectionwith the feeder. For the sake of illustration l have indicatedfluid-pressure operated shears, lll indicating the fluid pressurecylinder to whose piston rod is the shear hlades l) are connected insuch manner that an extension of the piston rod causes the shears-toopen and its retraction causes the blades to close.

Although for the sake of clearness o'l illustration oi the principles ofmy invention, l have minutely described the cmhodiments or"; the sameshown in the drawings, ll do not limit mysel'l thereby, hut claimloroadly. i

l. ln glass feeding mechanism, the comlhination oil a receptacle formolten glass provided. with a discharge orifice, means rcciprocatingWithin said receptacle for propelling the glass through said oriiice,and a rotary stirring tool immersed in the glass within said receptacle,for the purpose described.

2. lln apparatus tor producing a successsion ct charges of molten glass,the comloination of a receptacle for the molten glass provided With asubmerged discharge outlet, arigid reciprocating means. Working intheglass in relation to the outlet to control the discharge of glassfrom the outlet, means tor reciprocating said implement to more ittoward and away from the outlet. means tor detaching the dischargedmasses ot' glass from the outlet, and means to stir,

the glass in the receptacle including a second implement immersed insaid glass.

3. ln apparatus tor producinga succession ot charges ot molten glass,the comhinat-ion oi a receptacle for the molten glass provided with asuhmerged discharge outlet, a rigid reciprocating means Working in theglass in relation to the outlet to con trol the discharge of glass 'lromthe outlet, means tor reciprocating said implement to more it toward andaway trout the outlet, means for detaching the discharged masses otglass tram the outlet, a second implement immersed in the glass in thereceptacle, and means for rotating said second implement to stir theglass.

+l-. ln apparatus tor producing a. succession all charges oil moltenglass, the comhination o'l areeeptacle tor the molten glass providedwith a submerged discharge outlet, a rigid reciprocating means Workingin the glass in relation to the outlet to control the discharge or glassfrom the outlet, means reciprocating said implement to more it towardand away from the outlet, means for detaching the discharged masses ofglass from the outlet, and means to, stir the glass in the receptacleincluding a second implement immersed in said glass, said secondimplement being disposed out of alinement with said rigid reciprocatingimplement.

5.111 apparatus for producing a succession of charges of molten glass,the combination of a receptacle for the molten glass provided with asubmerged discharge out let, a rigid reciprocating means working in theglass in relation to the outlet to control the discharge of glass fromthe outlet, means tor reciprocating said implement to more it toward andaway from the outlet, means for detaching the discharged masses of glasstrom the outlet, at second implement immersed in the glass in thereceptacle, and means for rotating said second implement to stir theglass, said second implement being disposed out of alinement with saidrigid reciprocating implement.

6. ln apparatus for producing a succession of charges of molten glass,the combination of a receptacle for the molten glass provided with asubmerged discharge outlet, means eliective in alinement with the outletfor regulating the discharge of glass from the outlet, and a stirringimplement immersed in the glass in the receptacle.

7. In apparatus for producing a succession of charges of molten glass,the combination of a receptacle for the molten provided with a submergeddischarge outlet. means etl'ective in alineinent with the out let forregulating the discharge of glass from the outlet, and a stirringimplement immersed in the glass in the receptacle, said stirringimplement being disposed out of alinement with the outlet.

8. ln apparatus for producing a succession of charges ot' molten glass,the comhination of a receptacle for the molten glass provided with asubmerged discharge outlet, a rigid reciprocating implement working inthe glass in relation to the outlet to control the discharge of glassfrom the outlet, a

stirring implement immersed in the glass in" said receptacle, means lorreciprocating said lit-st mentioned implement to move it toward and awayfrom the outlet, and-means tor actuating said second mentioned implementto stir the glass in the receptacle.

9. ln apparatus for producing a sueees sion of charges of molten glass,the eomhintr tion of a receptacle tor the molten glass provided with asubmerged discharge outlet, a rigid implement Working in the glass inthe receptacle in relation toithe outlet to control the discharge olglass from the outlet, means for reciprocating said implement to move ittoward and away from the outlet, a power-driven reciprocating element,and connections between said element and said implement whereby themovement. of. reciprocating (implement. working in the I "saidimplement.

. said implement in a constant direction..

said element imparts rotary movement to glass in the' receptacle inrelation to the I outlet'to control the discharge of glass froim 10. Inapparatus for producing a succesthe oiitlet,means'for reciprocating theim- SlOIl o't charges of: molten glass, the combinaplement to move ittoward and away from tion ot a receptacle for the molten glass theoutlet,'-a racl? means for'jimparting a provided with a submergeddischarge '0utf'eciprocating mo ement to said rack, and

let, a. rigi'l' implement working in theglass meshed tooth connection'betweemtherack in the recgptacle in relation to the outlet to and theimplement whereby the reciprocacontrol the discharge of glass fronf theouttion of the rack imparts rotary movementto let, means forreciprocating said implement the implement in'a constant direction. L

to move it toward and away from the out- I 15. In apparatus forprodii'cing'a succeslet, a power-driven reciprocating element, sion ofcharges of molten glass, the combina-i and cbnnections between saidelement and tion of a receptacle for the molten glass sa d implementvwhereby the movement of provided with a submerged discharge outlet, saidelement imparts rotary movement to a rigid'reciprocatingimplement"working in I f the glass in relation to the outlet to control11. In apparatus for producing a succes: the'discharge of glass fromtheoutlet, means S lOIl of charges of molten glass, the combinaforreciprocating said implement to move it tion of a receptacle for themolten glass toward and a ay "fromtheoutlega double providedwi th asubmerged discharge .outrack" member, cans for imparting a reciplet, aIlgld implement working ll'lthG glass 'rocating movement to said rack,and meshed in the receptacle in relation to the outlet to connectionsbetween bdth sides of said rack control the discharge of glassfromftheoutmember and said implement whereby the a and connectionsbetween said element and 1 18. In apparatus for producing a succes- Ision of charges of molten glass, thecombmatio'n ot a receptacleifor themolten, glass means rigid reciprocating implement working: in from t theoutlet,- a rack, means for imparting a said member 'let, a power-drivenreciprocating element,

let, means for reciprocating said implement reciprocating movement ofsaid rack imparts t0 move lt towald and away from the outa; rotarymovement to said implement I 16. In apparatus for producing a succesand.connectlons between said element and sion of charges of molten glass,the cornbina said element imparts an intermit ent rot y provided witlfasubmerged discharge outlet,

movement toesaid implement.

12. In apparatus for producing a succes ,sion of charges of moltenglass, the combinasaid implement whereby the movement of tion of areceptacle for the molten glass j a a rigid reciprocating im lamentworking in inovement to said implement in a constant tion of areceptacle for the: molten glass for reciprocating said implement tomove it provided with a submerged discharge outtoward and away from theoutlet, a double let, a rigid implement working in the glass rackmember, means for imparting a recip-- in the receptacle in relation .tothe. outlet rocating movement to said rack, meshed to control thedischarge of glass from the connections between both sides of said rackoutlet, means for reciprocating said implemember and said implementwhereby the ment to move it toward and away from the reciprocatingmovementofsaid rack imparts outlet, a power-driven reciprocatingelement,a rotary movement tosaid implement, and means whereby the rotarymovement of the said implement whereby the movement of implement iscaused tobe in a'constant disaid element impartQ-an intermittent rotary,rection. I p

'17. In apparatus'for' producing a succession of charges of moltenglass, the combina- I tion of a receptacle for the molten glassprovidedwith a'submerged dischar e outlet, effective inalinement with te outlet having a submerged discharge outlet a for regulating thedischarge of the glass direction. o v:;

the glass in the receptacle in relation to. the means to movelit towardand away from outletto control the discharge of glassfrom the outlet,astirring implement immersed the outlet, means for reciprocating' theimin the glass in saidreceptacle, a power-replement to move it towardand away from ciproca ed member, and connections between and saidstirring 1mplement ent to said rack, and whereby the reciprocation-of'sa d unember reciprocating movem e outlet, means for reciprocatingsaid i meshed tooth connection between thejrack im arts rota-r 7,movement ,to said stirrin and the implement whereby the reciproca-'implement. tion of the rack imparts rotary. movement 18. In apparatusfor producing a succesto the implement. V sion'of charge's of moltenglass, the combinal4. In apparatus as producing a succestion ot areceptacle tor the molten glass sion of charges of molten glass, thecombinaprovided with asubmerged discharge outlet, tion -of a receptaclefor the molten glass means efi'ectivein' ahnement with the outlet havinga submerged discharge outlet, .a rigid for regulating the discharge ofthe glass ill till

(iii

from the outlet, means reciprocating said means to move it toward andaway from the outlet, astirring implement immersed in the glass in saidreceptacle, a powenreciprocated member, connections between said memberand said stirring implement Wherehy the reciprocation of said memberimparts a rotary movement to saidstirring implement, and means wherebythe rotary move ment of the impldment is caused to he in a constantdirection.

illl. ln apparatus for producing a succession of charges of moltenglass, the combination'ol a receptacle tor the molten glass providedwith a suhmerged discharge outlet, a rigid implement working in theglass in relation to the outlet and arranged for two characteristicmovements, a reciprocating movement and a rotary movement, means torreciprocating said implement to move it toward and away trom the outlet,means for rotating; said implement, and means for varying one of thecharacteristic movements at the implement Without changing its other.characteristic movement.

20. la apparatus'tor producing a succession or charges of molten glass,the com hination of a receptacle for the molten glass provided with asubmerged discharge outlet, a rigid implement Working in the glass inrelation to the outlet, means for recipro eating said implement to moveit toward and away from the outlet, means tor rotatinn," said implement,and means operahle While the driving connections suhsisttor varying therotary movement oil the implement Without changing" its reciprocating;movement.

Sill. lln apparatus tor producing" a successic-n ct charges of moltenglass, the comhination oft a receptacle tor the molten glass providedwith a suhnierged discharge out let, a rigid implement Working in theglass in relation to the outlet, means for recip rocat-ingr saidimplement to more it toward and array trom the outlet. means tor rotating said implement, and means opcrahle While the driving connectionssubsist tor varying the reciprocating movement at the mplement Withoutchanging its rotary move, ment.

lnapparatus tor producing a succession of charges o'l molten glass, thecomhination ota receptacle tor the molten glass provided With asubmerged discharge outlet, means ell'ective in alinement tritlrtlieoutlet to regulate the discharge ct glass "from the outlet, stirring"implement immersed in the glass-in said receptacle. means tor operatinnsaid stirring implement, and means "lor varying: the operation of saidstirring impleinent. Without changing" the operation oil said regnlatingmeans.

t'ltl. lln apparstus'tor producing: a succession ol charges t moltenglass, the comhination ot a receptacle llor the molten glass providedwith a submerged discharge outlet, a rigid implement working; in theglass in relation to the outlet to control the discharge of glass fromthe outlet,'means for. reciprocating said rigid implement to move ittoward or away from the outlet,-a stirring" implement immersed in theglass in said receptacle, means for actuating said stirring implement,and means for vary ing; the actuations of said stirring implementwithout changing" the movement of said rigid implement.

2t. ln apparatus-tor producing a succession 0t charges of molten glass,the combination of a receptacle tor'the molten glass proridcd with asubmerged discharge outlet, a rigid implement Working, in the glass inrelation to the outlet to control the discharge of glass from theoutlet, means for reciprocating said rigid implement to move it towardor away from the outlet, a stirring implement imersed in the glass insaid receptacle, meansdor rotating said stirring; implement, and meansfor varying the more ments of one of said implements Without varying themovements of the other oi said implements.

Q5. ln apparatus for producing; a succession of charges ct molten glass,the comhination of a receptacle tor the molten glass provided with asuhmerged discharge outlet, a rigid implement "working; in the glass inrelation to the outlet to control the discharge oi" glass from theoutlet, means for reciprocating said implement to move ittoward and awayfrom the outlet, and means for rotating said implement, said rotating,means intermittin the rotary movement oi? the implement While the latteris in its position nearest to the outlet.

E26. lln apparatus for producing; sion ct charges of molten glass, thecomhination ot' a receptacle tor the molten glass provided with asubmerged discharge outlet, a rigid implement WOl'ltlthQ," in thepqla'ss in relation to the outlet to control the dis charge at glassfrom the outlet, means for reciprocating said implement to move it to-Ward and array trom the outlet, and means for rotating" said implement,said rotary movement heing conlined to the periods durinp; which theimplement is in motion in its path of reciprocation.

t't'l. lln apparatus tor producing; a succea sion 0t mold charges atmolten glass, the comhination with a receptacle tor the molten alasshavinu a submerged discharge out let, cl rigid implement Working in theglass in the receptacle to control the dis charge out" ,erlass trom. theoutlet, tor reciprocating the implement to move it to Wttldlttlltl awayfrom the outlet, and connections tor rotating; the implement simultaneouly with its longitudinal movement,

a soccer-:

lZli

eaeaae said connections being such that the rotation ceasesv as theimplement approaches the outlet.

28. In apparatus for producing a succession of mold charges of moltenglass, the combination with a receptacle for the molten glass having asubmerged discharge outlet, of a rigid implement working in the ,glassin the receptacle to control the discharge-of glass from the outlet,fluid-pressure cylinder and piston means for rotating said implement,and means for adjusting the travel of the piston in the cylinder. I 1

29fln apparatus for producing a succession of mold charges of moltenglass, the combination with a receptacle for the molten glass having asubmerged discharge outlet, of a rigid implement working in the of June,1921.

glass in the receptacle to control the discharge of glass from theoutlet, fluid-pressure cylinder and piston means for rotating saidimplement, and means for varying the path of movement of the piston inthe cylinder. v

30. In apparatus for producing a succession of mold charges of moltenglass, the combination with a receptacle for the molten glass having asubmerged discharge outlet, of a rigid implement working in the 5 glassin the receptacle to control the discharge of glass from the outlet,fluid-pressure cylinder and piston means for rotating said implement,and means for varying the length of the stroke of said piston.

Signed at Pittsburgh, Pa, this 3rd day WILLIAM J. MILLER;

